Very good! Nice work, it's fun. I don't have a ton of specific feedback, because I think you have it pretty keyed in. My main point would be the observation that the most exciting fights, by far, were the ones that involved environmental hazards. You have a really good handle on the spacing and timing of combat, that feels good. When the fights are taking place in an environment where you are forced to think about where you are moving, it really completes the experience imo. In the first area you have spike traps and fire traps, but I think there is a lot more potential there. Especially when you start thinking about how the player, enemies, and environment all interact. Imagine a room full of exploding barrels. When you're fighting a fire mage, you want to avoid the barrels, and even get other enemies near them if you can because the fire mages will accidentally explode them. Or, what happens if a fire mage hits one of the bats? Maybe the bat gets lit on fire and when he hits you, spreads the fire to you.
Anyway, just something to think about. Good work.